Commercial-Scale Stonewool Blocks for High-Yield Hydroponic Production

The Grodan® Improved Gro-Block™ GR10 is the result of a research partnership between Grodan, Wageningen University & Research, and top commercial growers across North America. Engineered for large-format, high-density cultivation, this 4"x4"x4" block delivers the optimal balance of water retention, aeration, and root zone stability — at pallet scale.

Key Features

• 4" x 4" x 4" block with pre-cut plant hole — GR10 (Large) grade
• Loose on pallet — 1,584 blocks per pallet for high-volume operations
• White foil wrap for light reflection and temperature management
• Improved stonewool formula with enhanced wetting technology for faster, more uniform saturation
• Optimal air-to-water ratio supports vigorous root development and oxygen availability
• Consistent fiber structure ensures uniform water and nutrient distribution
• Reusable and recyclable — part of Grodan’s sustainable growing program

What’s Included

1,584 blocks loose on pallet, white foil wrapped. Ideal for commercial greenhouse and indoor farm operations.